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    • 17. 发明申请
    • DATA BUS BANDWIDTH SCHEDULING IN AN FBDIMM MEMORY SYSTEM OPERATING IN VARIABLE LATENCY MODE
    • 在可变延迟模式下操作的FBDIMM存储器系统中的数据总线带宽调度
    • US20080215832A1
    • 2008-09-04
    • US11680695
    • 2007-03-01
    • James J. AllenSteven K. JenkinsMichael R. Trombley
    • James J. AllenSteven K. JenkinsMichael R. Trombley
    • G06F12/00
    • G06F13/4243
    • A method and system for scheduling the servicing of data requests, using the variable latency mode, in an FBDIMM memory sub-system. A scheduling algorithm pre-computes return time data for data connected to all DRAM buffer chips and stores the return time data in a table. The return time data is expressed as a set of data return time binary vectors with one bit equal to “1” in each vector. For each received data request, the memory controller retrieves the appropriate return time vector. Additionally, the scheduling algorithm utilizes an updated history vector representing a compilation of data return time vectors of all executing requests to determine whether the received request presents a conflict to the executing requests. By computing and utilizing a score for each request, the scheduling algorithm re-orders and schedules the execution of selected requests to preserve as much data bus bandwidth as possible, while avoiding conflict.
    • 一种用于在FBDIMM存储器子系统中使用可变等待时间模式来调度数据请求的服务的方法和系统。 调度算法预先计算连接到所有DRAM缓冲器芯片的数据的返回时间数据,并将返回时间数据存储在表中。 返回时间数据表示为在每个向量中一位等于“1”的一组数据返回时间二进制向量。 对于每个接收到的数据请求,存储器控制器检索适当的返回时间向量。 此外,调度算法利用表示所有执行请求的数据返回时间向量的汇编的更新历史向量,以确定接收到的请求是否对执行请求产生冲突。 通过计算和利用每个请求的分数,调度算法重新排序和调度所选择的请求的执行,以尽可能地保留尽可能多的数据总线带宽,同时避免冲突。
    • 18. 发明授权
    • Inertial measurement unit using rotatable MEMS sensors
    • 使用可旋转MEMS传感器的惯性测量单元
    • US07212944B1
    • 2007-05-01
    • US11414895
    • 2006-05-01
    • Stewart M. KohlerJames J. Allen
    • Stewart M. KohlerJames J. Allen
    • G01P3/00G01P21/00
    • G01C19/5719G01P1/00G01P21/00
    • A MEM inertial sensor (e.g. accelerometer, gyroscope) having integral rotational means for providing static and dynamic bias compensation is disclosed. A bias compensated MEM inertial sensor is described comprising a MEM inertial sense element disposed on a rotatable MEM stage. A MEM actuator drives the rotation of the stage between at least two predetermined rotational positions. Measuring and comparing the output of the MEM inertial sensor in the at least two rotational positions allows for both static and dynamic bias compensation in inertial calculations based on the sensor's output. An inertial measurement unit (IMU) comprising a plurality of independently rotatable MEM inertial sensors and methods for making bias compensated inertial measurements are disclosed.
    • 公开了具有用于提供静态和动态偏置补偿的整体旋转装置的MEM惯性传感器(例如,加速度计,陀螺仪)。 描述了偏置补偿的MEM惯性传感器,其包括设置在可旋转MEM级上的MEM惯性感测元件。 MEM致动器驱动平台在至少两个预定旋转位置之间的旋转。 在至少两个旋转位置中测量和比较MEM惯性传感器的输出允许基于传感器输出的惯性计算中的静态和动态偏置补偿。 公开了包括多个可独立旋转的MEM惯性传感器和用于进行偏置补偿的惯性测量的方法的惯性测量单元(IMU)。
    • 19. 发明授权
    • Erected mirror optical switch
    • 立式镜面光开关
    • US06903861B1
    • 2005-06-07
    • US10763913
    • 2004-01-22
    • James J. Allen
    • James J. Allen
    • G02B6/35H04Q11/00G02B26/00G02B7/182
    • G02B6/357G02B6/3502G02B6/3518G02B6/3546G02B6/3584H04Q11/0005H04Q2011/003H04Q2011/0052
    • A microelectromechanical (MEM) optical switching apparatus is disclosed that is based on an erectable mirror which is formed on a rotatable stage using surface micromachining. An electrostatic actuator is also formed on the substrate to rotate the stage and mirror with a high angular precision. The mirror can be erected manually after fabrication of the device and used to redirect an incident light beam at an arbitrary angel and to maintain this state in the absence of any applied electrical power. A 1×N optical switch can be formed using a single rotatable mirror. In some embodiments of the present invention, a plurality of rotatable mirrors can be configured so that the stages and mirrors rotate in unison when driven by a single micromotor thereby forming a 2×2 optical switch which can be used to switch a pair of incident light beams, or as a building block to form a higher-order optical switch.
    • 公开了一种基于使用表面微加工形成在可旋转台上的可直立反射镜的微机电(MEM)光开关装置。 静电致动器也形成在基板上,以高角度精度旋转平台和反射镜。 镜子可以在制造装置之后手动竖立,并且用于以任意的角度重定向入射光束,并且在没有任何施加的电力的情况下保持该状态。 可以使用单个可旋转镜来形成1xN光学开关。 在本发明的一些实施例中,多个可旋转反射镜可以被构造成使得当由单个微型马达驱动时,台和反射镜一致地旋转,从而形成可用于切换一对入射光束的2x2光开关, 或作为构成单元以形成高阶光开关。